EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC3728LIUH#TRPBF

Description
IC REG CTRLR BUCK 32QFN
CategoryPower/power management    The power supply circuit   
File Size444KB,38 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC3728LIUH#TRPBF Overview

IC REG CTRLR BUCK 32QFN

LTC3728LIUH#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeQFN
package instructionHVQCCN, LCC32,.2SQ,20
Contacts32
Manufacturer packaging codeUH
Reach Compliance Codecompliant
ECCN codeEAR99
Other featuresALSO OPERATES IN ADJUSTABLE MODE FROM 4.8 V TO 5.2 V
Analog Integrated Circuits - Other TypesDUAL SWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage30 V
Minimum input voltage3.6 V
Nominal input voltage15 V
JESD-30 codeS-PQCC-N32
JESD-609 codee3
length5 mm
Humidity sensitivity level1
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current3 A
Nominal output voltage3.35 V
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC32,.2SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency590 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width5 mm
FeaTures
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
LTC3728L/LTC3728LX
Dual, 550kHz, 2-Phase
Synchronous Regulators
DescripTion
The LTC
®
3728L/LTC3728LX are dual high performance
step-down switching regulator controllers that drive all
N-channel synchronous power MOSFET stages. A constant-
frequency, current mode architecture allows phase-lockable
frequency of up to 550kHz. Power loss and noise due to
the ESR of the input capacitors are minimized by operating
the two controller output stages out of phase.
OPTI-LOOP compensation allows the transient response to
be optimized over a wide range of output capacitance and
ESR values. The precision 0.8V reference and power good
output indicator are compatible with future microproces-
sor generations, and a wide 4.5V to 28V (30V maximum)
input supply range encompasses all battery chemistries.
A RUN/SS pin for each controller provides both soft-
start and optional timed, short-circuit shutdown. Current
foldback limits MOSFET dissipation during short-circuit
conditions when overcurrent latchoff is disabled. Output
overvoltage protection circuitry latches on the bottom
MOSFET until V
OUT
returns to normal. The FCB mode
pin can select among Burst Mode, constant-frequency
mode and continuous inductor current mode or regulate
a secondary winding. The LTC3728L/LTC3728LX include
a power good output pin that indicates when both outputs
are within 7.5% of their designed set point.
L,
LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, OPTI-LOOP and PolyPhase
are registered trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
n
Dual, 180° Phased Controllers Reduce Required
Input Capacitance and Power Supply Induced Noise
OPTI-LOOP
®
Compensation Minimizes C
OUT
±1% Output Voltage Accuracy (LTC3728LC)
Power Good Output Voltage Indicator
Phase-Lockable Fixed Frequency 250kHz to 550kHz
Dual N-Channel MOSFET Synchronous Drive
Wide V
IN
Range: 4.5V to 28V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting
Latched Short-Circuit Shutdown with Defeat Option
Output Overvoltage Protection
Low Shutdown I
Q
: 20µA
5V and 3.3V Standby Regulators
3 Selectable Operating Modes: Constant-Frequency,
Burst Mode
®
Operation and PWM
5mm × 5mm QFN and 28-Lead Narrow SSOP
Packages
Notebook and Palmtop Computers
Telecom Systems
Portable Instruments
Battery-Operated Digital Devices
DC Power Distribution Systems
applicaTions
n
n
n
n
n
Typical applicaTion
4.7µF
M1
L1
3.2µH
C
B1
, 0.1µF
D1
+
D3
V
IN
PGOOD INTV
CC
TG1
BOOST1
SW1
BG1
f
IN
500kHz
PLLIN
SENSE1
+
LTC3728L/
LTC3728LX
TG2
BOOST2
SW2
BG2
PGND
SENSE2
+
1000pF
SENSE1
V
OSENSE1
SENSE2
V
OSENSE2
I
TH2
C
SS2
0.1µF
C
C2
220pF
R
C2
15k
C
B2
, 0.1µF
D4
1µF
CERAMIC
M2
V
IN
5.2V TO 28V
C
IN
22µF
50V
CERAMIC
L2
3.2µH
D2
R
SENSE1
0.01Ω
V
OUT1
5V
5A
1000pF
R
SENSE2
0.01Ω
V
OUT2
3.3V
5A
+
C
OUT1
47µF
6V
SP
R2
105k
1%
R1
20k
1%
C
C1
220pF
R
C1
15k
I
TH1
C
SS1
0.1µF
RUN/SS1 SGND RUN/SS2
R3
20k
1%
R4
63.4k
1%
C
OUT
56µF
6V
SP
+
M1, M2: FDS6982S
Figure 1. High Efficiency Dual 5V/3.3V Step-Down Converter
3728 F01
3728lxff
1
I am self-studying microcontrollers
I am self-studying single-chip microcomputers. There are many tutorial books out there, but they are basically copies of product manuals. None of them are suitable for self-study. Why? Because this is...
总工程师 MCU
Lots of gadgets and information
I have browsed over 100 pages of forums these days and found them. I have sorted them out and downloaded what I need....:loveliness:...
newbedeng MCU
TI will have a live broadcast with awards at 10 am today [New generation multi-band multi-protocol SimpleLink MCU platform]
[font=微软雅黑][size=3]From ultra-low power sensor controllers to the latest and coolest multi-protocol and multi-band functions, you can master new technologies in minutes. [/size][/font][font=微软雅黑][size...
EEWORLD社区 TI Technology Forum
Will anyone want me to work in embedded systems after I turn 35?
If you work on PC software, by the age of 35, generally no one wants you because the PC software currently produced by Chinese companies does not have high technical content. If you work for 10 years ...
QQ837477829 Embedded System
How to blow the fuse, (with what tool), how to get the password?
I have written a program using jtga and want to blow the fuse, but the JTGA tool does not work. Can I only use the BSL tool? Can the BSL tool be connected to the serial port line?How to blow the fuse,...
wgmdsf Microcontroller MCU
netconn_accept problem with lwip1.2
Using lwip1.2 version, the lower computer can be pinged, but the netconn_accept function cannot return correctly when the upper computer connects to the lower computer....
wqyear Embedded System

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2560  10  2566  678  2431  52  1  14  49  21 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号